M240i Catless DP JB4 CEL

4seriesNL · 03-23-2019, 06:07 AM

So I have an ER catless downpipe and a jb4 on my 2017 m240i
Seems I get a cel every so often, which is fine. But the codes change sometimes.
I'll use this post to post the codes I get.
Can someone confirm they are normal for jb4 catless dp combo

Today:
12AF20: Oxygen sensor after catalytic converter, signal: Fixed at lean in coasting/overrun mode

139001: Oxygen sensor after catalytic converter, from rich to lean: Delayed response DME8FF_R

B58togo · 03-23-2019, 01:45 PM

I get the 12AF20 all the time.

4seriesNL · 03-23-2019, 08:09 PM

Quote:

Originally Posted by B58togo

I get the 12AF20 all the time.

I always get a 12BB01, first time for this one

03-23-2019, 06:07 AM	#1
4seriesNL Private First Class 87 Rep 121 Posts Drives: 2017 BMW M240i Join Date: Jan 2018 Location: St. John's, Newfoundland iTrader: (0)	M240i Catless DP JB4 CEL So I have an ER catless downpipe and a jb4 on my 2017 m240i Seems I get a cel every so often, which is fine. But the codes change sometimes. I'll use this post to post the codes I get. Can someone confirm they are normal for jb4 catless dp combo Today: 12AF20: Oxygen sensor after catalytic converter, signal: Fixed at lean in coasting/overrun mode 139001: Oxygen sensor after catalytic converter, from rich to lean: Delayed response DME8FF_R __________________ Instagram: 709m240i
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03-23-2019, 01:45 PM	#2
B58togo Major 809 Rep 1,369 Posts Drives: M240i Join Date: Feb 2017 Location: NY iTrader: (0)	I get the 12AF20 all the time. __________________ 2017 M240i/ ZF8 Pure Drivetrain Solutions Stage 1 & torque converter/xHP/ DAW Ultra Flow/ DS2/ Nostrum injectors/ E40 Doug Newton tuned/ ER DP/ Remus axle back/ BMS intake/ FTP CP/ M Perf LSD
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